Techniks SYIC-22915 End Mill Holder CAT40 With Retention Knob

The Techniks SYIC-22915 CAT40 End Mill Holder with Retention Knob securely clamps solid-shank end mills for precision milling, slotting, profiling, and roughing in CAT40 CNC systems. It is designed for rigid side-lock tool retention with through-spindle coolant and is commonly installed in CAT40 vertical and horizontal machining centers, CNC milling machines, and OEM metalworking equipment that require reliable clamping and through-spindle coolant capability. Key specifications include a 3/8 in bore, 3.00 in projection, 1.75 in body diameter, 2.50 in overall diameter, and a 1.00 in nose diameter; bore tolerance H5, AT3 precision ground taper, maximum runout 0.0002 in TIR, and a balance rating of G6.3 at 15,000 RPM with a maximum speed of 15,000 RPM. This hardened alloy steel holder conforms to DIN 69871-AD, includes a retention knob, and is intended for replacement, retrofit, precision machining, and preventive maintenance in aerospace manufacturing, automotive production, mold and die machining, heavy equipment fabrication, precision metalworking, and general CNC production environments where accurate end mill clamping and vibration resistance matter. Common replacements include Techniks SYIC-22915-4 (CAT40 × 3/8"), SYIC-22915-6 (CAT40 × 3/8"), and SYIC-22913 (CAT40 × 5/16").